There is loctite on the caliper bolt threads. You'll need a sturdy box end wrench and a heavy rubber or dead blow hammer. A few strong hits will brake the loctite then the bolts will come out. Somewhat stiff, but they'll come. Reinstall with a drop or two of loctite.
I kicked it with my foot. I kicked a 3/4 flat wrench from under the car while laying down on back. It worked like a charm.
Just finished installing the rotor and pads on one side but had to stop because it's raining now. Tomorrow is another day another brake.
All four wheels have new rotors and pads. Here are some of the issues I notice while working on the car:
One of the pins that holds a pad inside the front passenger caliper wasn't inserted all the way. The old rotor felt like it had an uneven surface. The pad that wasn't attached the pin was worn out at angle where the little sensor was almost showing.
On the other side, the front driver side, one pad seemed to have been wedged in by force and it wasn't moving at all. I had to remove it after I unbolted the caliper. It was stuck real good in there.
I was wondering what kind of clown mechanic did all this brake work before I purchased the car? No wonder it felt weird sometimes when I applied the brake. It would sound and feel like a warped rotor then sometimes after braking to a stop and when I start moving I would hear an awful rubbing sounds where part of that sound is like transmitted to the steering wheel where I would feel something.
Anyway, I test drove the car after I replaced everything and none of those pesky problems showed up.
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!